#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "delay.h"
#include "air32f10x.h"
#include "can.h"

#define PRINTF_LOG 	printf
#define DATA_LEN	8

USART_TypeDef* USART_TEST = USART1;

void UART_Configuration(uint32_t bound);
uint8_t GetCmd(void);

int main(void)
{	
	uint8_t res,i,key;
	uint8_t canbuf[8];
	RCC_ClocksTypeDef clocks;

	Delay_Init();
	UART_Configuration(115200);
	RCC_GetClocksFreq(&clocks);
	
	PRINTF_LOG("\n");
	PRINTF_LOG("SYSCLK: %3.1fMhz, HCLK: %3.1fMhz, PCLK1: %3.1fMhz, PCLK2: %3.1fMhz, ADCCLK: %3.1fMhz\n", \
	(float)clocks.SYSCLK_Frequency/1000000, (float)clocks.HCLK_Frequency/1000000, \
	(float)clocks.PCLK1_Frequency/1000000, (float)clocks.PCLK2_Frequency / 1000000, (float)clocks.ADCCLK_Frequency / 1000000);
	
	PRINTF_LOG("AIR32F103 CAN LoopBack.\n");

	CAN_Mode_Init(CAN_SJW_1tq,CAN_BS2_8tq,CAN_BS1_9tq,4,CAN_Mode_LoopBack);//CAN初始化环回模式,波特率500Kbps    
	
	while(1)
	{
		if(GetCmd() == 's')
		{
			for(i = 0; i < DATA_LEN; i++)
			{
				canbuf[i]=0x5A+i;
			}
			res=Can_Send_Msg(canbuf,8);//发送8个字节 
			if(res==0)PRINTF_LOG("Can Loop Back Send Data Success\n");
			else PRINTF_LOG("Can Loop Back Send Data Fail\n");
		}
		
		key=Can_Receive_Msg(canbuf);
		if(key)
		{	
			PRINTF_LOG("Can Loop Back Recv Data Success\n");
 			for(i=0;i<key;i++)
			{									    
				PRINTF_LOG("canbuf[%d] = 0x%x\n",i,canbuf[i]);
 			}
		}
	}
}


uint8_t GetCmd(void)
{
	uint8_t tmp = 0;

	if(USART_GetFlagStatus(USART1,USART_FLAG_RXNE))
	{
		tmp = USART_ReceiveData(USART1);
	}
	return tmp;
}

void UART_Configuration(uint32_t bound)
{
	GPIO_InitTypeDef GPIO_InitStructure;
	USART_InitTypeDef USART_InitStructure;

	RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);

	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; 
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;	
	GPIO_Init(GPIOA, &GPIO_InitStructure);

	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
	GPIO_Init(GPIOA, &GPIO_InitStructure);
	
	USART_InitStructure.USART_BaudRate = bound;
	USART_InitStructure.USART_WordLength = USART_WordLength_8b;
	USART_InitStructure.USART_StopBits = USART_StopBits_1;
	USART_InitStructure.USART_Parity = USART_Parity_No;
	USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
	USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;

	USART_Init(USART_TEST, &USART_InitStructure);
	USART_Cmd(USART_TEST, ENABLE);
}


int SER_PutChar (int ch)
{
	while(!USART_GetFlagStatus(USART_TEST,USART_FLAG_TC));
	USART_SendData(USART_TEST, (uint8_t) ch);

	return ch;
}

int fputc(int c, FILE *f)
{
	/* Place your implementation of fputc here */
	/* e.g. write a character to the USART */
	if (c == '\n')
	{
		SER_PutChar('\r');
	}
	return (SER_PutChar(c));
}

